Considering the recent sad news about Dave Schultz, I wouldn't be surprised if they were also being careful due to those concussions, without highlighting it.Knee soreness - not sure there's much more to it at this stage
He had it cleaned out after last season and that seemed to majorly interrupt his summer
His return to the field was round 2 in the VFL, but lasted less then a half due to a concussion. His return from concussion was delayed, and the next we saw of him was 2 months later in round 11 of the VFL
He then played 4.25 AFL games - subbed out with concussion, and now back out with knee soreness
I wouldn't totally rule him out for the season, but not sure he should a first choice option at the moment either